opnet和c联合编程，包括库文件、内核、状态机的代码，ppp的网络场景仿真代码。-Such as opnet and c joint programming, including libraries, the kernel, state machine code, the PPP s network scene simulation code.

source code for ppp dialing

GPRSLib allows to establish PPP connection for following mobile network operators: Megafon, MTS, Beeline, Rostelecom. It keeps PPP connection alive